import java.util.Scanner;

public class Check {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("输入一段文字串:");
        String data_pub = input.nextLine();
        String hide_words="abc";
        String replace_words="";
        for(int i=0;i<hide_words.length();i++)
            replace_words+="*";
        data_pub=data_pub.replace(hide_words,replace_words);
        System.out.println(data_pub);
    }
}
